GPS kav hlau txais xov kev ua tau zoo
Peb paub tias GPS locator yog lub davhlau ya nyob twg rau qhov chaw lossis kev taw qhia los ntawm kev tau txais cov teeb liab satellite.Nyob rau hauv tus txheej txheem ntawm kev txais cov teeb liab, yuav tsum tau siv lub kav hlau txais xov, yog li peb hu rau lub kav hlau txais xov uas tau txais lub teeb liab GPS kav hlau txais xov.GPS satellite teeb liab tau muab faib ua L1 thiab L2, nrog zaus ntawm 1575.42MHZ thiab 1228MHZ feem, ntawm cov L1 yog qhib pej xeem teeb liab nrog ncig polarization.Lub teeb liab lub zog yog hais txog 166-DBM, uas yog lub teeb liab tsis muaj zog.Cov yam ntxwv no txiav txim siab tias cov kav hlau txais xov tshwj xeeb yuav tsum tau npaj rau kev txais tos ntawm GPS teeb liab.
1. Ceramic sheet: Qhov zoo ntawm cov hmoov ceramic thiab cov txheej txheem sintering ncaj qha cuam tshuam rau nws cov kev ua tau zoo.Cov nplooj ntawv ceramic tam sim no siv hauv kev ua lag luam feem ntau yog 25 × 25, 18 × 18, 15 × 15 thiab 12 × 12.Qhov loj ntawm thaj tsam ntawm daim ntawv ceramic, qhov ntau dua qhov dielectric tas li, qhov ntau dua qhov resonance zaus, thiab qhov zoo dua qhov kev lees paub.Feem ntau ntawm cov ceramic daim yog cov square tsim, thiaj li yuav xyuas kom meej tias lub resonance nyob rau hauv lub XY kev taw qhia yog yeej ib yam, thiaj li mus cuag cov nyhuv ntawm uniform hnub qub sau.
2. Cov txheej nyiaj: Cov nyiaj txheej ntawm cov kav hlau txais xov ceramic tuaj yeem cuam tshuam rau cov zaus resonant ntawm tus kav hlau txais xov.Qhov zoo tshaj plaws zaus taw tes ntawm GPS ceramic nti ntog raws nraim ntawm 1575.42MHz, tab sis qhov zaus ntawm lub kav hlau txais xov tau yooj yim cuam tshuam los ntawm ib puag ncig ib puag ncig, tshwj xeeb tshaj yog thaum nws tau sib sau ua ke hauv tag nrho lub tshuab, qhov zaus taw tes yuav tsum tau hloov kho kom nyob ntawm 1575.42MHz los ntawm kev kho cov duab ntawm cov nyiaj txheej txheej..Yog li ntawd, GPS ua tiav tshuab tuam ntxhab yuav tsum koom tes nrog cov tuam txhab kav hlau txais xov thaum yuav cov kav hlau txais xov thiab muab cov tshuab ua tiav rau kev kuaj.
3. Feed point: Lub kav hlau txais xov ceramic sau cov teeb liab resonance los ntawm qhov chaw pub khoom noj thiab xa mus rau tom qab kawg.Vim lub impedance txuam ntawm tus kav hlau txais xov, qhov taw tes pub yog feem ntau tsis nyob hauv nruab nrab ntawm lub kav hlau txais xov, tab sis hloov me ntsis hauv XY kev taw qhia.Xws li ib qho kev sib piv impedance yog yooj yim thiab tsis ntxiv tus nqi.Tsiv tsuas yog nyob rau hauv ib tug axis yog hu ua ib tug tib-bias kav hlau txais xov, thiab tsiv nyob rau hauv ob axes yog hu ua ob-bias.
4. Amplifying Circuit Court: cov duab thiab cheeb tsam ntawm PCB nqa lub kav hlau txais xov ceramic.Vim yog cov yam ntxwv ntawm GPS rebound, thaum lub keeb kwm yav dhau yog 7cm × 7cm GPS kav hlau txais xov muaj plaub qhov tseem ceeb: nce (Gain), sawv nthwv dej (VSWR), suab nrov (Ntsuab daim duab), axial piv (Axial piv).Ntawm lawv, qhov sib piv axial yog tshwj xeeb, uas yog ib qho tseem ceeb qhia los ntsuas qhov sib txawv ntawm lub teeb liab nce ntawm tag nrho lub tshuab nyob rau hauv ntau cov lus qhia.Txij li thaum cov satellites tau muab faib rau hauv lub ntuj hemispherical, nws tseem ceeb heev kom ntseeg tau tias cov kav hlau txais xov muaj qhov zoo sib xws hauv txhua qhov kev qhia.Axial piv yog cuam tshuam los ntawm kav hlau txais xov kev ua tau zoo, cov qauv zoo li, sab hauv Circuit Court thiab EMI ntawm tag nrho lub tshuab.
Post lub sij hawm: Oct-20-2022
